1 files changed, 11 insertions, 0 deletions
diff --git a/test/files/neg/t5580a.scala b/test/files/neg/t5580a.scala
new file mode 100644
index 0000000000..742f0e85ea
--- /dev/null
+++ b/test/files/neg/t5580a.scala
@@ -0,0 +1,11 @@
+import scala.collection.mutable.WeakHashMap
+
+class bar{ }
+class foo{
+  val map = WeakHashMap[AnyRef, collection.mutable.Map[bar, collection.mutable.Set[bar]]]()
+
+  def test={
+    val tmp:bar=null
+    if (map.get(tmp).isEmpty) map.put(tmp,collection.mutable.Set())
+  }
+}